2147643 has 6 divisors (see below), whose sum is σ = 3102164. Its totient is φ = 1431756.

The previous prime is 2147641. The next prime is 2147657. The reversal of 2147643 is 3467412.

2147643 is a `hidden beast` number, since 2 + 14 + 7 + 643 = 666.

It is not a de Polignac number, because 2147643 - 2¹ = 2147641 is a prime.

It is a super-2 number, since 2×2147643² = 9224740910898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2147641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119305 + ... + 119322.

2^2147643 is an apocalyptic number.

2147643 is a deficient number, since it is larger than the sum of its proper divisors (954521).

2147643 is a wasteful number, since it uses less digits than its factorization.

2147643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238633 (or 238630 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 2147643 is about 1465.4838791334. The cubic root of 2147643 is about 129.0191065984.

The spelling of 2147643 in words is "two million, one hundred forty-seven thousand, six hundred forty-three".